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   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "replacements.h"
  25 #include "time_support.h"
  26 #include "log.h"
  27
  28 #include <stdlib.h>
  29 #include <sys/time.h>
  30 #include <time.h>
  31
  32 int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y);
  33 int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y);
  34 int timeval_add_time(struct timeval *result, int sec, int usec);
  35
  36 /* calculate difference between two struct timeval values */
  37 int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y)
  38 {
  39         if (x->tv_usec < y->tv_usec)
  40         {
  41                 int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
  42                 y->tv_usec -= 1000000 * nsec;
  43                 y->tv_sec += nsec;
  44         }
  45         if (x->tv_usec - y->tv_usec > 1000000) {
  46                 int nsec = (x->tv_usec - y->tv_usec) / 1000000;
  47                 y->tv_usec += 1000000 * nsec;
  48                 y->tv_sec -= nsec;
  49         }
  50
  51         result->tv_sec = x->tv_sec - y->tv_sec;
  52         result->tv_usec = x->tv_usec - y->tv_usec;
  53
  54         /* Return 1 if result is negative. */
  55         return x->tv_sec < y->tv_sec;
  56 }
  57
  58 /* add two struct timeval values */
  59 int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y)
  60 {
  61         result->tv_sec = x->tv_sec + y->tv_sec;
  62
  63         result->tv_usec = x->tv_usec + y->tv_usec;
  64
  65         while (result->tv_usec > 1000000)
  66         {
  67                 result->tv_usec -= 1000000;
  68                 result->tv_sec++;
  69         }
  70
  71         return 0;
  72 }
  73
  74 int timeval_add_time(struct timeval *result, int sec, int usec)
  75 {
  76         result->tv_sec += sec;
  77         result->tv_usec += usec;
  78
  79         while (result->tv_usec > 1000000)
  80         {
  81                 result->tv_usec -= 1000000;
  82                 result->tv_sec++;
  83         }
  84
  85         return 0;
  86 }
  87
  88 int duration_start_measure(duration_t *duration)
  89 {
  90         gettimeofday(&duration->start, NULL);
  91
  92         return ERROR_OK;
  93 }
  94
  95 int duration_stop_measure(duration_t *duration, char **text)
  96 {
  97         struct timeval end;
  98
  99         gettimeofday(&end, NULL);
 100
 101         timeval_subtract(&duration->duration, &end, &duration->start);
 102
 103         if (text)
 104         {
 105                 float t;
 106                 t=duration->duration.tv_sec;
 107                 t+=(float)duration->duration.tv_usec/1000000.0;
 108                 *text = malloc(100);
 109                 snprintf(*text, 100, "%fs", t);
 110         }
 111
 112         return ERROR_OK;
 113 }
 114
 115
 116
 117
 118 long long timeval_ms()
 119 {
 120         struct timeval now;
 121         long long t=0;
 122         gettimeofday(&now, NULL);
 123
 124         t+=now.tv_usec/1000;
 125         t+=now.tv_sec*1000;
 126
 127         return t;
 128 }